Kriegsmarine Panerai Watch for Combat Divers

Officine Panerai Brevetee "Radiomir", Rolex SA-Genève, Suisse, 31 Victoires, Haute Precision, case no. 260553, reference no. 3646 / Type D, Rolex Cal. 618 / Type 1, 47 x 47 mm, manufactured circa 1944. These watches were manufactured by Panerai in collaboration with Rolex.

Important combat diver watch of the German Kriegsmarine with original buckle and original leather strap - to this day fewer than 80 watches of this type have been documented. The case made of steel, on the underside of the leather strap buckle with scratched owner's name "Striebeck", the original crown with inscription "Brevet" and Swiss cross. The dial made of blackened brass, the hands as well as the numerals and markers on the dial originally lacquered with luminous compound "Radiomir". Movement: bridge movement, monometallic screw balance. Clearly worn watch, fully functional, in original condition. Also from the same estate a cap badge for members of the small battle units (Kleinkampfverbände), the famous sawfish, made of aluminum hand-crafted, on the reverse with small signature of the soldier who made the sawfish. These badges were sewn onto the side of the garrison cap. Worn, condition 2.

Additional watches of reference 3646 / Type D are listed in the book "Vintage Panerai - The References" by Ralf Ehlers & Volker Wiegmann in chapter II.IV (pages 398-531), which also contains a historical photograph of a combat diver with a Panerai Ref. 3646 with brass dial (page 475). This section of the book shows an overview of various decorative polishes on the inner sides of the cases (Type A-Type G) (page 486).

Radiomir Panerai
Thanks to the luminous compound "Radiomir" invented in 1914 - a mixture of zinc sulfate and radium bromide - the Panerai dials were particularly easy to read at night and deep underwater. Panerai knew how to exploit this advantage for watches as well, and thus was commissioned with the production of the first wristwatch for combat divers, called "Radiomir". The first prototypes were manufactured directly at Rolex, later the watches with their cases based on the Oyster principle were produced at Panerai. In 1936, the Panerai Radiomir became classified equipment of the Italian Navy.
Source: "Armbanduhren Klassik Katalog", Königswinter 2005, page 146.

The decision to form combat diver groups in the German Kriegsmarine following the model of the Italian Navy was made in 1943. The idea came from Admiral Heye, who wanted to utilize the experience of the allied Italians. Six Germans were sent to the Italian school in Valdagno, where the Italian combat diver base in northern Italy was located under the command of Borghese and Eugenio Wolk. These German divers were sent on one hand by the Abwehr of the Reich Main Security Office and on the other hand by the Kriegsmarine (von Wursian and Ritchie Reimann). After the first course, the Kriegsmarine took over leadership in relations with the Italians and also led the intelligence men who went to the Italian training center in Valdagno and Venice. The intelligence men came from special units of the “Brandenburg” Division and from SS commandos of the special unit led by Otto Skorzeny. The first Kriegsmarine men formed the K-Unit (Kommando für Kleinkampfmittel) as the German naval combat diver unit.

The Abwehr wanted to maintain its autonomy as an intelligence service and founded its own combat diver school under the leadership of Hauptmann Helmers from Otto Skorzeny's special units. A well-known later operation by the combat divers was the destruction of the Allied-captured bridge at Nijmegen in Holland by K-men of the Navy in September 1944.

Of the watches used by the German combat divers, some models are preserved in various collections in Germany, France, and Japan. They are identical to the first models that came from the Italian importer Panerai, with the exception of some details of the dial or engravings on the back. This is understandable, since the training and initial instruction of the combat divers began in 1943 in Italy with the "Decima MAS" group ("Mezzi d'Assalto Subacqueo"). These men already had ten years of experience and many successful operations at the beginning of the war. It was natural that the instructors' equipment would be used for these small units. The men knew that their Italian colleagues used the most modern and effective equipment of that time. Even if the planned missions differed, they could still benefit from the strategy and experience.

A Rolex diving watch from the Italian navigation instrument supplier Panerai, displayed at the technical naval museum in La Spezia, was the reference model for wartime use. This watch was given to the museum by Admiral Ernesto Notari, who served as a young officer with the Italian combat divers. This watch has the following features: Rolex case with lugs for the strap, the movement with a diameter of 30 mm based on a Cortébert caliber with 15 jewels and a power reserve of approximately 48 hours, screw-down crown for time adjustment, the screw-down case back is hand-engraved: "X. FLOT. M.A.S. 01". This appears to be the first watch issued to this "10th Flotilla". The black dial is marked: "Radiomir Panerai". Inside the case back is engraved: "Montres Rolex, Geneve". With high probability, all these watches were finished by Panerai and delivered to the German Navy during the war, specifically without any signature for reasons of secrecy.


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Kriegsmarine Panerai Watch for Combat Divers

The Panerai Radiomir Reference 3646 Type D represents one of the most extraordinary chapters in maritime military technology of the Second World War. This dive watch embodies the unusual collaboration between Italian and German special naval forces and stands as a symbol of the development of specialized equipment for a new form of naval warfare.

The origins of this remarkable watch lie in Italy. In 1916, Officine Panerai filed a patent for Radiomir, a radium-based powder that gives luminosity to the dials of sighting instruments and devices. This innovation proved crucial for developing instruments that needed to be readable under extreme conditions. The first maritime special forces units on the European theater of war were established by the Kingdom of Italy with the founding of the Decima MAS in spring 1941. Italy could draw upon development and operational experience from the final phase of the First World War and until 1943 fielded the only successfully operating special naval forces in the Mediterranean region.

Panerai developed the reference 3646 in collaboration with Rolex for the Royal Italian Navy, in particular for their frogmen who needed a reliable and legible watch in the extreme conditions endured during long and deep water diving. The cases came from Rolex SA and were based on their Oyster construction, the movements were Rolex Caliber 618, while dials and assembly were undertaken by Officine Panerai in Florence. Between 1938 and the early 1950s, Panerai produced the reference 3646 in various variants classified from Type A to Type G, each bearing unique aesthetics.

In 1943, Admiral Karl Dönitz ordered Vice-Admiral Hellmuth Heye to create a special unit. It was originally named Kleinkampfmittelverband (small ordnance unit) but it became better known under the name of K-Verband or Meereskämpfer (ocean warriors). Admiral Heye wanted to utilize the experience of the allied Italians. German divers were sent to the Italian school at Valdagno, where the Italian combat swimmer base in northern Italy operated under the leadership of Borghese and Eugenio Wolk. In March 1944, Heye assumed command of the Kleinkampfverbände as Admiral and special ordnance general officer in the Supreme Naval Command.

The Kleinkampfverbände der Kriegsmarine, also called Kommando der Kleinkampfverbände, refers to various units of the German Navy that operated small-scale combat systems during the Second World War. The Supreme Naval Command understood small combat systems to be independently operating and easily deployable maritime combat units. These primarily included manned torpedoes, combat swimmers, midget submarines, and explosive boats.

A 1984 Rolex letter states that 720 Ref. 3646 watches were produced in 1943. This refers most certainly to the Type D batch with case numbers between 260400 and 261120. The present watch belongs to an order of 720 reference 3646 pieces made in mid-1943 but delivered in three lots. The first batch consisting of watches numbered 260400-260695 was delivered in 1943, the second group with serials 260696-260849 in early 1944, and the last lot featuring case numbers 260850-261120 in the second quarter of 1944.

The Type D dials are further known as "Kampfschwimmer" dials, and primarily date to the mid-1940s. A hallmark of these is the fact that they are anonymous or feature no branding or brand markings on the dial. The dial consists of blackened brass with luminous Radiomir paint on numbers and indices, arranged in a 3-6-9-12 Arabic numeral layout. The 3646 cases had inner case backs stamped "Brevette Rolex SA Geneve Suisse" touting their 31 wins for precision, with a serial number and the reference number. The crown was marked "Brevet" with a Swiss cross. The case measures 47 x 47 mm and houses a Rolex Caliber 618 Type 1 movement.

The 3646 models were watches that were used by the Italian Decima Flottiglia MAS frogman units and Kampfschwimmers during the WWII years. With few exceptions, all of these watches were requisitioned by the German Navy. Today there are far fewer than 500 known surviving 3646s, with 211 well-documented. Of the Type D variant, fewer than 80 examples are known until today.

The Sägefisc (sawfish) badge that Kleinkampfverbände members wore on the side of their service caps was instituted on November 30, 1944, by Supreme Commander of the Navy Karl Dönitz. The proficiency and combat badges of the small combat units comprised one proficiency level and seven combat levels and could be awarded to members of the Kleinkampfverbände of the Kriegsmarine in recognition of daring, successfully executed attacks by the small combat units. According to the Law on Titles, Orders and Decorations of July 26, 1957, the wearing of this decoration is permitted in the Federal Republic of Germany, as the original designs contained no National Socialist emblems. Incidentally, the sawfish is the same animal that features on the Bundeswehr's present-day Kampfschwimmer badge as well.

A notable operation by the Kampfschwimmer was the attack on the Allied-captured bridge at Nijmegen in Holland by K-men of the Navy in September 1944. The Allies had taken intact a road bridge at Nijmegen and a railway bridge at Moerdijk, and had immediately installed a strong anti-aircraft defense there. In order to assist with a German counter-offensive against the Nijmegen salient, three groups of four German frogmen set off from 10 km upstream from the bridges. They were to place explosives under the bridges and then to continue with the river current 24 km further to return to their lines.

The Panerai Reference 3646 Type D embodies the technological innovation and extreme specialization that characterized the maritime special forces of the Second World War. These extraordinary timepieces, of which only a handful are documented today, remain silent witnesses to one of the most dangerous and specialized branches of naval warfare.